2 of the best coins are bitcoin and ethereum, this is very commonly used as a long-term investment by many members of this forum, these two coins continue to be a favorite for future investment.
This is exactly what so many investors have been doing throughout their course of investment. Since the prices had been way too down in the starting days of the coins, there had been a constant gain in the value of every unit of coin with the rising values. This definitely took long but eventually there was a profit margin worth millions of dollars so this is the reason why investment in Bitcoin and ETH is preferred on this forum and generally in the market.